EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Basic earnings per share [Abstract]
Income available to common stockholders									$ 12,174	$ 12,446	$ 12,552
Weighted average common shares outstanding (in shares)									10,539,271	8,978,972	8,898,692
Earnings per share (in dollars per share)	$ 0.32	$ 0.30	$ 0.25	$ 0.29	$ 0.32	$ 0.37	$ 0.35	$ 0.35	$ 1.16	$ 1.38	$ 1.41
Diluted earnings per share [Abstract]
Income available to common stockholders									$ 12,174	$ 12,446	$ 12,552
Weighted average common shares outstanding (in shares)									10,539,271	8,978,972	8,898,692
Add dilutive effects of potential additional common stock (in shares)									64,248	229,863	557,234
Weighted average common and dilutive potential Common shares outstanding (in shares)									10,603,519	9,208,835	9,455,926
Earnings per share assuming dilution (in dollars per share)	$ 0.32	$ 0.30	$ 0.25	$ 0.29	$ 0.31	$ 0.37	$ 0.34	$ 0.33	$ 1.15	$ 1.35	$ 1.33
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities not considered in computing diluted earnings per share (in shares)									0	25,850	25,850